Removed sentence in \mainpage docs that only applied to ReFr.
Removed sentence in \mainpage docs that only applied to ReFr.

julianromera/infact,alex-quiterio/infact,alex-quiterio/infact,alex-quiterio/infact,google/infact,julianromera/infact,alex-quiterio/infact,julianromera/infact,google/infact,alex-quiterio/infact,julianromera/infact,julianromera/infact